Sight Glasses, also called Sight Eyes and Sight Bubbles, are available in 2", 3" and 5" diameters utilizing glass and plastic visual eyes, usually in a bubble shape, but may also be available in a flat window configuration. The weld ring is available to match the material of the tank; steel, stainless steel and aluminum. 2' and 3" types are generally threaded, and the 5" is usually glass and held in place by a frame and Jam Nut. Also available are Sight Tubes; usually a length of clear hose, secured between to elbows welded in the tank - acting much like a boiler sight tube. Sight Glasses and Tubes are a lower cost solution to gauging the fluid level in your tank. They are subject to breaking if subjected to a hard shock and it is a good practice to always keep a spare in the tool box.
Sight Glasses Cost Less at Armstrong Equipment Inc. It's always easy to shop for Sight Glasses at Armstrong Equipment Inc. because you can browse by best sellers, brand, price range, customer rating, or special offers.